FORKS — The cause has been ruled “undetermined” for a Jan. 2 fire that gutted a 7,400-square-foot building at the Department of Natural Resources’ Olympic Region complex at 411 Tillicum Lane, District No. 1 Fire Chief Bill Paul said.

There was “no indication” the blaze at the 70-employee, 20-acre complex was deliberately set, Paul added.

Its point of origin was inside the two-story building, Paul said.

“The building was absolutely, totally secured,” he added.

The blaze was the fourth fire that burned structures in the Forks area in 65 days stretching from Oct. 29, when the historic former Odd Fellows hall and the adjacent former Dazzled by Twilight souvenir store downtown were destroyed.

City officials this week were still awaiting a report from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives, but District No. 1 officials have said the ATF has determined the Oct. 29 fire was electrical in origin.